X0303 4 2009-07-01 0001094739 FINISAR CORP FNSR 0001378817 Colyar Mark C/O OPTIUM CORPORATION 500 HORIZON DRIVE, SUITE 500 CHALFONT PA 18914 1 Sr. VP Operations/Engineering Common Stock 2009-07-01 2009-07-01 4 F 0 8378 0.56 D 606769 D On July 1, 2009, the Reporting Person vested in 27,396 restricted stock units ("RSUs") and as a result acquired 27,396 shares of common stock of the Issuer pursuant to the Reporting Person's September 2, 2008 grant of RSUs. This Form 4 reports the disposition of shares withheld by the Issuer pursuant to the RSUs' grant agreement in order to satisfy the Reporting Person's withholding obligations for various taxes due upon the vesting of the RSUs. The Issuer will pay the taxes on behalf of the Reporting Person. Mark Colyar 2009-07-06